Actor Joshua Herdman was a celebrity guest at last weekend's London Film and Comic Con, during which time he met and greeted fans.
Photos of Josh can be seen
here:

According to Josh's guest assistant at the event,
Emmeh, he will be
reprising his role of Gregory Goyle in
Deathly Hallows (hardly seen in the first part, but far more significant in the second half). Josh also stated that there is a chance that Jamie Waylett (Crabbe) may not reprise his role, however nothing is confirmed on that matter (especially given
recent circumstances), so for now that is a rumour.
Josh admitted that there will be a larger focus on Blaise Zabini instead of Crabbe in the final
Harry Potter films. Louis Cordice - who played Blaise in
Half-Blood Prince - is
confirmed to reprise his role as the young Slytherin in the last two
Deathly Hallows films.
Note: Joshua said these things BEFORE Jamie was sentenced.
Harry Potter and the Deathly Hallows will be released on November 19, 2010 and July 15, 2011.